#include<bits/stdc++.h>

using namespace std;
using ll = long long;
#define endl '\n'

template<typename T=int>
inline T read() {
    T x;
    cin >> x;
    return x;
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    int n = read();
    set<int> a;
    for (int i = 0; i < n; i++) {
        a.insert(read());
    }
    for (auto e:a) {
        cout << e << " ";
    }

    return 0;
}
